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Math: Introducing Standard Units of Length and Developing Closer Approximations of Measuring Time

Suggested Time Frame: 18 Instructional Days

        

Focus TEKS

Measure Length Using Standard Units

  • 2.9A find the length of objects using concrete models for standard units of length
  • 2.9B describe the inverse relationship between the size of the unit and the number of units needed to equal the length of an object
  • 2.9C represent whole numbers as distances from any given location on a number line
  • 2.9D determine the length of an object to the nearest marked unit using rulers, yardsticks, meter sticks, or measuring tapes

Solve Problems Involving Length

  • 2.9E determine a solution to a problem involving length, including estimating lengths
  • 2.4C solve one-step and multi-step [length] word problems involving addition and subtraction within 1,000 [100 in this unit] using a variety of strategies based on place value, including algorithms

Measure Time

  • 2.9G read and write time to the nearest one-minute increment using analog and digital clocks and distinguish between a.m. and p.m.
Computational Fluency TEKS

Subtraction Fact Strategies

  • 2.4A recall basic facts to add and subtract within 20 with automaticity [Count On and Use Doubles strategies in this unit]

1st Grade Skip Counting

  • 1.5B skip count by twos, fives, and tens to determine the total number of objects up to 120 in a set;
Spiral Review TEKS

Addition and Subtraction [Solving, Explaining, and Representing]

  • Solving
    • 2.4C solve one-step and multi-step word problems involving addition and subtraction within 1,000 [100 in this unit] using a variety of strategies based on place value, including algorithms [Re-introduce CGI problem types JCU, SCU, PPW-PU, and Compare]
      • 2.10C write and solve one-step word problems involving addition or subtraction using data represented within pictographs and bar graphs with intervals of one
  • Explaining
    • 2.1D communicate mathematical ideas, reasoning, and their implications using multiple representations, including symbols, diagrams, graphs, and language as appropriate
    • 2.1G display, explain, and justify mathematical ideas and arguments using precise mathematical language in written or oral communication
  • Representing
    • 2.4D generate and solve problem situations for a given mathematical number sentence involving addition and subtraction of whole numbers within 1,000 [100 in this unit]
    • 2.7C represent and solve addition and subtraction word problems where unknowns may be any one of the terms in the problem